package org.itboys.fuzion.tools;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;
/**
 * 客户端IP
 * 
 * @author Administrator
 *
 */
public final class ClientIp { 
	
    
    public static String getIpAddr(HttpServletRequest request) {   
        String ipAddress = null;   
        //ipAddress = this.getRequest().getRemoteAddr();   
        ipAddress = request.getHeader("x-forwarded-for");   
        if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {   
        	ipAddress = request.getHeader("Proxy-Client-IP");   
        }   
        if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {   
            ipAddress = request.getHeader("WL-Proxy-Client-IP");   
        }   
        if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {   
        	ipAddress = request.getRemoteAddr();   
            if(ipAddress.equals("127.0.0.1")){   
            	//根据网卡取本机配置的IP   
                InetAddress inet=null;   
		        try {   
		        	inet = InetAddress.getLocalHost();   
		        } catch (UnknownHostException e){   
		        	e.printStackTrace();   
		        }   
		        ipAddress= inet.getHostAddress();   
	        }   
               
        }   
     
        //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割   
        if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15   
            if(ipAddress.indexOf(",")>0){   
                ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));   
            }   
        }   
        return ipAddress;    
     }   
}